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Evolution of detrimental secondary phases in unstable Cu2ZnSnS4 films during annealing

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Title
Evolution of detrimental secondary phases in unstable Cu2ZnSnS4 films during annealing
Author(s)
Jung H.R.; Shin S.W.; Gurav K.V.; Gang M.G.; Jeong Yong Lee; Moon J.H.; Kim J.H.
Publication Date
2016-01
Journal
ELECTRONIC MATERIALS LETTERS, v.12, no.1, pp.139 - 146
Publisher
KOREAN INST METALS MATERIALS
Abstract
The formation and phase evolution of Cu-S based compounds in kesterite Cu2ZnSnS4 (CZTS) absorbing thin films is a critical factor affecting the performance of these materials in thin film solar cells (TFSCs). However, to the best of our knowledge, few studies have investigated the segregation of Cu-S based compounds in kesterite thin films during the sulfurization process. In this study, stacked Cu/SnS2/ZnS precursor thin films were annealed to systematically study the segregation and phase evolution of Cu-S based compounds in kesterite thin films subjected to functional sulfurization times at 550°C. The stacked precursor thin films appeared to be fully transformed to the pure kesterite phase when the sulfurization times are over 30 min. when analyzed using X-ray diffraction and Raman spectroscopy. However, transmission electron microscopy (TEM) characterization revealed that Cu-S based compounds segregated in the kesterite CZTS thin films annealed for 120 min. at 550°C. Based on the experimental results obtained for functional sulfurization times, a mechanism for Cu-S based compounds segregation and the phase evolution process is proposed. [Figure not available: see fulltext.] © 2016, The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht
URI
https://pr.ibs.re.kr/handle/8788114/3315
ISSN
1738-8090
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
Electron. Mater. Lett., Vol. 12, No. 1 (2016), pp. 139-146.pdfDownload

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